World Air Ops | NAT | Doc 007 MNPS Guidance

More documents

Recommendations

Info

Guidance concerning Air Navigation in and above the NAT MNPSA CHAPTER 6CHAPTER 6:COMMUNICATIONS AND POSITION REPORTINGPROCEDURES6.1 ATS COMMUNICATIONS6.1.1 It is important that pilots appreciate that routine air/ground ATS Voice communications inthe NAT Region are conducted via aeradio stations staffed by communicators who have no executive ATCauthority. Messages are relayed by the ground station to/from the air traffic controllers in the relevantOAC.6.1.2 In the North Atlantic Region there are six aeronautical radio stations, one associated witheach of the Oceanic Control Areas. They are: Bodo Radio (Norway, Bodo ACC), Gander Radio (Canada,Gander OACC), Iceland Radio (Iceland, Reykjavik ACC), New York Radio (USA, New York OACC),Santa Maria Radio (Portugal, Santa Maria OACC) and Shanwick Radio (Ireland, Shanwick OACC).However, the aeradio stations and OACs are not necessarily co-located. For example, in the case ofShanwick operations, the OAC is located at Prestwick in Scotland whilst the associated aeradio station is atBallygirreen in the Republic of Ireland. In addition to those six aeronautical stations, there are two otherstations that operate NAT frequencies. They are Canarias Radio which serves Canarias ACC and ArcticRadio serving Edmonton, Winnipeg and Montreal ACC’s.HF Voice Communications6.1.3 The majority of NAT air/ground voice communications are conducted on SSB HFfrequencies. To support air/ground ATC communications in the North Atlantic Region, twenty-four HFfrequencies have been allocated, in bands ranging from 2.8 to 18 MHz.6.1.4 There are a number of factors which affect the optimum frequency for communications overa specific path. The most significant is the diurnal variation in intensity of the ionisation of the refractivelayers of the ionosphere. Hence frequencies from the lower HF bands tend to be used for communicationsduring night-time and those from the higher bands during day-time. Generally in the North Atlanticfrequencies of less than 7 MHz are utilised at night and frequencies of greater than 8 MHz during the day.6.1.5 The 24 NAT frequencies are organized into six groups known as Families. The families areidentified as NAT Family A, B, C, D, E and F. Each Family contains a range of frequencies from each of theHF frequency bands. A number of stations share families of frequencies and co-operate as a network toprovide the required geographical and time of day coverage.. A full listing of the frequency hours ofoperation of each NAT aeradio station is contained in the “HF Management Guidance Material for the NATRegion” – ICAO NAT Doc 003 (Appendices C- 1 thru 6), available via the ICAO EUR/NAT website atwww.paris.icao.int/ . Each Family is designated for use by aircraft of specific States of Registry andaccording to the route to be flown. NAT ATS provider State AIPs list the families of frequencies to be used.6.1.6 Each individual aircraft is normally allocated a primary and a secondary HF frequency,either when it receives its clearance or by domestic controllers shortly before the oceanic boundary.6.1.7 When initiating contact with an aeradio station the pilot should state the HF frequency inuse. HF Radio operators usually maintain a listening watch on more than one single frequency.Identification by the calling pilot of the particular frequency being used is helpful to the radio operator.NAT Doc 007 30 Edition 2010
Guidance concerning Air Navigation in and above the NAT MNPSA CHAPTER 6SELCAL6.1.8 When using HF communications and even when using ADS and/or CPDLC, pilots shouldmaintain a listening watch on the assigned frequency, unless SELCAL is fitted, in which case they shouldensure the following sequence of actions:a) provide the SELCAL code in the flight plan; (any subsequent change of aircraft for a flightwill require passing the new SELCAL information to the OAC);b) check the operation of the SELCAL equipment, at or prior to entry into Oceanic airspace,with the appropriate aeradio station. (This SELCAL check must be completed prior tocommencing SELCAL watch); andc) maintain thereafter a SELCAL watch.6.1.9 It is important to note that it is equally essential to comply with the foregoing SELCALprovisions even if SATCOM Voice or ADS/CPDLC are being used for routine air/ground ATScommunications. This will ensure that ATC has a timely means of contacting the aircraft.6.1.10 Flight management staffs and crews of aircraft equipped with 12-tone SELCAL equipmentshould be made aware that SELCAL code assignment is predicated on the usual geographical area ofoperation of that aircraft. If the aircraft is later flown in geographical areas other than as originally specifiedby the aircraft operator, the aircraft may encounter a duplicate SELCAL code situation. Whenever anaircraft is to be flown routinely beyond the area of normal operations or is changed to a new geographicoperating area, the aircraft operator should contact the SELCAL Registrar and request a SELCAL codeappropriate for use in the new area.6.1.11 When acquiring a previously owned aircraft equipped with SELCAL, many aircraftoperators mistakenly assume that the SELCAL code automatically transfers to the purchaser or lessee. Thisis not true. As soon as practical, it is the responsibility of the purchaser or lessee to obtain a SELCAL codefrom the Registrar, or, if allocated a block of codes for a fleet of aircraft, to assign a new code from withinthe block of allocated codes. In the latter instance, if 12-tone equipment is involved, the Registrar should beconsulted when there is any question as to the likely geographical area of operation and the possibility ofcode duplication.6.1.12 The registrar can be contacted via the AFTN address KDCAXAAG, and by including“ATTN. OPS DEPT. (forward to SELCAL Registrar)” as the first line of message text.VHF Voice Communications6.1.13 Aeradio stations are also responsible for the operation of General Purpose VHF (GP/VHF)outlets. North Atlantic flights may use these facilities for all regular and emergency communications withrelevant OACs. Such facilities are especially valuable in the vicinity of Iceland, Faroes and Greenland sinceVHF is not as susceptible to sunspot activity as HF. Outlets are situated at Prins Christian Sund, which isremotely controlled from Gander Aeradio station, and at Qaqatoqaq, Kulusuk, several locations in Icelandand the Faroes, via Iceland Radio. Theoretical VHF coverage charts are shown at Attachment 5. When usingGP/VHF frequencies in areas of fringe coverage however, care should be taken to maintain a SELCALwatch on HF thus ensuring that if VHF contact is lost the aeradio station is still able to contact the aircraft. Itis important for the pilot to appreciate that when using GP/VHF, as with HF and SATCOM Voice, thesecommunications are with an aeradio station and the pilot is not in direct contact with ATC. However DirectController/Pilot Communications (DCPC) can be arranged, if necessary, via patch-through on some GP/VHFfrequencies.NAT Doc 007 31 Edition 2010
Page 1 and 2: www.worldairops.comThis document is
Page 3: Guidance concerning Air Navigation
Page 7 and 8: Guidance concerning Air Navigation
Page 97 and 98:
Guidance concerning Air Navigation
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145:
www.worldairops.comThis document is
show all

World Air Ops | NAT | Doc 007 MNPS Guidance

Create successful ePaper yourself

Delete template?

Save as template?